Tezislər / Theses

THE 3
rd
 INTERNATIONAL SCIENTIFIC CONFERENCES OF STUDENTS AND YOUNG RESEARCHERS 
dedicated to the 99
th
anniversary of the National Leader of Azerbaijan Heydar Aliyev
176
Case 1: Directed Up or Down. In this case we take the difference 
between the y-coordinate of the current centroid and the mean of previous 
centroids. If the difference is negative, the direction is considered as “Up”, if 
the difference is positive, it is considered as “Down”.
On the picture (Frame), the y-coordinate of the current centroid of the 
dog is 50 approximately, while the mean of previous centroids is < 50. The 
difference will be > 0 which lets the program know that the direction of the 
dog is down. For the cat, it will be vice versa, therefore up. 
Case 2: Directed Left or Right. In this case we take the difference 
between the x-coordinate of the current centroid and the mean of previous 
centroids. If the difference is negative, the direction is considered as “Left”, if 
the difference is positive, it is considered as “Right”. 
On the picture (Frame), the x-coordinate 
of the current centroid of the person is 90 
approximately, while the mean of previous 
centroids is < 90. The difference will be > 0 
which lets the program know that the direction 
of the person is to the left. For the car, it will 
be vice versa, therefore to the right. 
Several tests were carried out to check 
the accuracy, from where certain conclusions 
were made. The method used is pretty 
accurate, having an accuracy of almost 90% 
(every 9 out of 10 people are detected 
exactly), yet dependent on the environment 
of the recording space. To be clear, in some 
cases, the cloth of the person may be the 
same as the ground, thus making the person 
blend with it. Another important factors which 
may affect the quality are stabilization and 
the angle of the footage under which it is 
taken or recorded. It is more efficient to 
place the camera firmly to the ceiling or the 
needed surface, so that it will not shake or 
move at the slightest impact.
The results of one of the experiments, 
where there is up/down direction detected, 
are shown below. So, as we mentioned 
earlier, the software before “seeing” and 
making clear that there is a person in the 
frame is in the status of Detecting (1
st
picture). In a fraction of a second, the person 

---